Characteristics of natural gas geochemistry and migration in Xiaoquan-Xinchang area, Western Sichuan Depression

被引：1
作者：
Zhao, Shuangfeng [1 ,2 ]
Zhang, Zhihuan [1 ,2 ]
Li, Wenhao [3 ]
Yan, Hongxing [4 ]
Wan, Tiantian [1 ,2 ]
Ma, Ling [1 ,2 ]
机构：
[1] College of Geosciences in China University of Petroleum, Beijing
[2] State Key Laboratory of Petroleum Resource and Prospecting in China University of Petroleum, Beijing
[3] Research Institute of Unconventional Petroleum and Renewable Energy in China University of Petroleum, Qingdao
[4] Exploration & Development Research Institute, PetroChina Liaohe Oilfield Company, Panjin
来源：
Zhongguo Shiyou Daxue Xuebao (Ziran Kexue Ban)/Journal of China University of Petroleum (Edition of Natural Science) | 2015年 / 39卷 / 02期
关键词：
Natural gas; Penglaizhen Formation; Secondary gas pool; Segregative migration; Western Sichuan Depression; Xiaoquan-Xinchang area;
D O I：
10.3969/j.issn.1673-5005.2015.02.005
中图分类号：
学科分类号：
摘要：
The weakest link in the field of petroleum geology has been the research on the natural gas migration. Methane carbon isotope, gas drying coefficient (C1/C1-5), iC4/nC4, non-hydrocarbon gas composition and numbers of tracer gas migration parameters were applied to analyze the migration characteristics of the continental natural gas in Xiaoquan-Xinchang area. The results show that the Xujiahe Formation is adjacent to source rocks where natural gas is accumulated nearby. The formation has unapparent secondary gas migration characteristic. Due to short migration distance, the hydrocarbon generation and expulsion of the source rocks and natural gas reservoir occurred almost at the same time. Jurassic aged gas is the secondary gas pool, whose migration channel is the deep fault belt in the Himalayan Formation. The gas migrated vertically from the Xujiahe Formation to the Jurassic reservoir, and then migrated laterally along the channel sand body from the low potential region of conformation to the high potential region of conformation, and reached the appropriate entrapment for accumulation. The dominating natural gas migration period is the end Late Cretaceous-Paleogene. ©, 2015, University of Petroleum, China. All right reserved.
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页码：31 / 38
页数：7
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